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A138221 as a simple table

na(n)
11
22
33
44
55
66
77
84
93
105
1111
126
1313
147
155
168
1717
186
1919
2010
217
2211
2323
248
255
2613
279
287
2929
3010
3131
328
3311
3417
355
369
3737
3819
3913
408
4141
4214
4343
4411
459
4623
4747
4812
497
5010
5117
5213
5353
549
555
568
5719
5829
5959
6012
6161
6231
637
648
655
6611
6767
6817
6923
7010
7171
7212
7373
7437
7515
7619
777
7813
7979
8010
819

[1,2,3,4,5,6,7,4,3,5,11,6,13,7,5,8,17,6,19,10,7,
 11,23,8,5,13,9,7,29,10,31,8,11,17,5,9,37,19,13,8,
 41,14,43,11,9,23,47,12,7,10,17,13,53,9,5,8,19,29,
 59,12,61,31,7,8,5,11,67,17,23,10,71,12,73,37,15,
 19,7,13,79,10,9]